What is 1 add 1? please help me

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

Afootball is throw by a quarterback to a receiver